Your point is interesting anon, thing is that Daron didn't plan for any of those small things you are mentioning, muddled racism themes, magical high commission comming as dumb idiots and incompetents, Starco, even the "development" of some characters were never part of Nefcy's ideas.
All of those were added later in the show, if anything the first two seasons were the ones that received more work and had some kind of "idea" when being worked on, somewhat episodic or so it seemed, but at least they had some story to tell. And that story is that Nefcy had never planned Marco and Star being a thing, she had the show in her hands for 20 years and Marco was her enemy more than a friend, a guy that disliked her autist way of thinking. So Marco having his own portion on Star's tale was probably Giancarlo Volpe's (bless the man) hand rather than Daron.
A good example of that is the AMA, fuck how come they contradict themselves while being in the same room?